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Stock-Based Compensation
9 Months Ended
Sep. 30, 2011
Stock-Based Compensation [Abstract] 
STOCK-BASED COMPENSATION
NOTE 14. STOCK-BASED COMPENSATION
We recognize stock-based compensation expense based on the fair value of awards issued. Stock-based compensation for the three months and six months ended September 30, 2011 and 2010 is as follows (in thousands):
                 
    September 30,  
    2011     2010  
 
               
Three months
  $ 3,228     $ 2,075  
Nine months
    9,362       5,895  
Stock Options
Stock option awards are granted with an exercise price equal to the market price of our stock at the date of grant, a four-year vesting schedule, and a term of 10 years, except as noted below.
During the third quarter of 2011, we granted non-qualified stock options to our Chief Executive Officer that will vest based on the achievement of certain stock price targets. The stock-based compensation cost and derived service periods for these stock options were estimated using the Monte Carlo simulation method utilizing a volatility of 61.6% and a risk-free rate of 2.4%. The weighted-average fair value of these awards is $2.92 per share and the derived service periods range from approximately one and one-half years to approximately two years. As of September 30, 2011, no part of the grant had been achieved. If the targets are not met, the non-qualified stock options will expire on the third anniversary of the grant date.
A summary of our stock option activity for the nine months ended September 30, 2011 is as follows (in thousands):
         
    Shares  
 
       
Options outstanding at December 31, 2010
    5,709  
Options granted
    1,484  
Options exercised
    (198 )
Options forfeited
    (483 )
Options expired
    (260 )
 
     
Options outstanding at September 30, 2011
    6,252  
 
     
Restricted Stock Units
A summary of our non-vested Restricted Stock Units activity for the nine months ended September 30, 2011 is as follows (in thousands):
         
    Shares  
 
       
Balance at December 31, 2010
    447  
RSUs granted
    512  
RSUs vested
    (123 )
RSUs forfeited
    (86 )
 
     
Balance at September 30, 2011
    750